22-Jun-2006
EP-93 – 30 V, 1.07 A, 2.7 A (peak), Universal Input Supply
7.5 Transformer Construction
1/2 Primary
Start at Pin 2. Wind 20 bifilar turns of item [3] in
approximately 1.25 layer, finish on Pin 3.
Basic Insulation Use one layer of item [5] for basic insulation.
Bifilar Bias
Winding
Starting at Pin 5, wind 5 bifilar turns of item [3]. Spread turns
evenly across bobbin. Finish at Pin 4.
Basic Insulation Use two layers of item [5] for basic insulation.
30 V Quad filar Start at Pins 9 and 10. Wind 10 quad filar turns of item [4]
Secondary
Winding
(about 2 layers). Spread turns evenly across bobbin. Finish
on Pins 7 and 8.
Basic Insulation Use two layers of item [5] for basic insulation.
Shield
Starting at Pin 1, wind 7 bifilar turns of item [3]. Spread turns
evenly across bobbin. Leave 1/2-inch of flying lead at finish.
Basic Insulation Use two layers of item [5] for basic insulation. Trap flying lead
from shield winding between tape layers.
1/2 Primary
Start at Pin 3. Wind 19 bifilar turns of item [3] in
approximately 1 layer, finish on Pin 1.
Finish Wrap
Use three layers of item [5] for finish wrap.
Final Assembly Assemble and secure core halves. Dip Varnish (item [6]).
Power Integrations
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